VCFRONT_a257 — Port Expander VOR

Full alert identifier: VCFRONT_a257_portExpanderVOR

Alert description

The front vehicle controller (VCFRONT) has detected a condition affecting a group of eFuses, making an eFuse system reset necessary.

Vehicle may be unable to drive.

VCFRONT detects a group of eFuses with a common power source have all tripped (circuit opened).

The integrated circuit (I2C) port expander connecting the microcontroller and eFuse enable pins is reset after a retry or sleep cycle.

These diagnostic fields are associated with VCFRONT_a257. Check the alert's Alert Log in Service Mode Plus for available values.

Signal	Unit
Epas 3 P Fault `VCFRONT_a257_epas3pFault`	—
Epas 3 S Fault `VCFRONT_a257_epas3sFault`	—
Esp Fault `VCFRONT_a257_espFault`	—
I Booster Fault `VCFRONT_a257_iBoosterFault`	—
Lockout Voltage `VCFRONT_a257_lockoutVoltage`	V
Pcs Fault `VCFRONT_a257_pcsFault`	—
Rev Batt Fault `VCFRONT_a257_revBattFault`	—
Vbat Fused Fault `VCFRONT_a257_vbatFusedFault`	—

Show 4 more fields

Signal	Unit
Vcleft Fault `VCFRONT_a257_vcleftFault`	—
Vcright Fault `VCFRONT_a257_vcrightFault`	—
Vcright Lockout Status `VCFRONT_a257_vcrightLockoutStatus` 0 IDLE 1 PENDING 2 ACTIVE	—
Vehicle State `VCFRONT_a257_vehicleState`	—

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a257.